2025年天天练口算五年级数学上册人教版第76页答案
200 + x = 250
x =
50

4x - 7.5 = 8.5
x =
4

5x = 15
x =
3

x + 4.5 = 8.5
x =
4

6(x + 2) = 42
x =
5

x ÷ 7 = 0.4
x =
2.8

4.8 + x = 15.2
x =
10.4

(1 + x) ÷ 1.1 = 3
x =
2.3

1.6x = 6.4
x =
4

x - 3 = 1.5
x =
4.5

14 + 8x = 54
x =
5

4y = 96
y =
24

3 - x = 1.5
x =
1.5

(x - 6) ÷ 2 = 7.5
x =
21

8.4 ÷ x = 2.1
x =
4

时间( )

答案

200 + x = 250
x = 250 - 200
x = 50
4x - 7.5 = 8.5
4x = 8.5 + 7.5
4x = 16
x = 16 ÷ 4
x = 4
5x = 15
x = 15 ÷ 5
x = 3
x + 4.5 = 8.5
x = 8.5 - 4.5
x = 4
6(x + 2) = 42
x + 2 = 42 ÷ 6
x + 2 = 7
x = 7 - 2
x = 5
x ÷ 7 = 0.4
x = 0.4 × 7
x = 2.8
4.8 + x = 15.2
x = 15.2 - 4.8
x = 10.4
(1 + x) ÷ 1.1 = 3
1 + x = 3 × 1.1
1 + x = 3.3
x = 3.3 - 1
x = 2.3
1.6x = 6.4
x = 6.4 ÷ 1.6
x = 4
x - 3 = 1.5
x = 1.5 + 3
x = 4.5
14 + 8x = 54
8x = 54 - 14
8x = 40
x = 40 ÷ 8
x = 5
4y = 96
y = 96 ÷ 4
y = 24
3 - x = 1.5
x = 3 - 1.5
x = 1.5
(x - 6) ÷ 2 = 7.5
x - 6 = 7.5 × 2
x - 6 = 15
x = 15 + 6
x = 21
8.4 ÷ x = 2.1
x = 8.4 ÷ 2.1
x = 4
时间( )